kelsey



A. KELSEY.

. Hot-Air Furnace.

N0. 8,908. Patented April 27 1852.

STATES Pa'rn'r ALEXR. KELSEY, OF ROCHESTER, NEW YORK, ASSIGNOR TO JAMES COWLES.

WARM-AIR FURNACE.

Specification of Letters Patent No. 8,908, dated April 27, 1852.

- tion of the same, reference being had to the accompanying drawings, forming part of this specification, in which Flgure 1, 1s a. front view in elevation.

Fig. 2, is a vertical section taken at the line m-ac in Fig. 5. Fig. 3, is a side view of the fire pot showing the expansion rod and le-' vers for opening the valve at the bottom of the smoke pipe. Fig. 4, is a section of the smoke pipe showing the self regulating damper. Fig. 5, is a horizontal section taken at about the line Y, Y, Fig. 2. Fig. 6 20 is a .planor birdseye view of theannular eraporating pan.

Similar letters of reference indicate corresponding parts in each of the several figures. it 7 The nature of my invention consists in the employment of an equalizing flange so. arranged that the air which enters the furnace on both sides of a radiating cylinder is warmed to about the same temperature be fore entering the warm air conducting flues.

To enable others skilled inthe art to make and use my invention I will proceed to describe the manner in which it is constructed.

A, Figs. 2, 3, 5 is the fire pot constructed ofcast iron. B, is the ash pit. C, is a cir- 'cular passage around the ash pit, and D, is a tube leading from it to the bottom of the smoke pipe.

E, E, Fig. 2, is a sheet iron cylinder termed a heater. This encompasses the fire pot A, and fits tightly over the top of the i base a, or that part which forms the circular passage. (Z, are openings in the top of the base by which communication is effected between the interior of the heater E, E, tube D, and Smokepipea-the heater E, E, is larger in diameter than the fire pot A, and extends some distance above it and is closed at the top, seeFig. 2.

1 F, F, is a middle or radiating flue also constructed of sheet iron and surrounding the inner cylinder or heater E, E, a suitable spacebeing between them, this radiating cylinder is open. at the top and is nearly as high as the inner cylinder or heater E, E, thelower part fits tightly over a small vertical Fig. 3.

G, G, is the outer cylinder which incloses the whole, this may be constructed of sheet iron, tin,-zinc, or galvanized iron, a suitable space is allowed between the outer and radiating cylinders see Fig.2. The space beprojection e, of the base, see

' tween the outer cylinder G, G, and the inner cylinder or heater E, E, is the air chamber and it is divided per endicularl b the radiating cylinder F, y y

H, H, is an equalizing flange. This is a circular piece of met-a1 attached to the radiatlng cylinder F, F, and extending inwardly to the heater or inner cylinder E, E, and outwardly to the outer cylinder G, G, this flange divides the air chamber horizontally.

it, h, are passages or tubes on the flange, tubes lnchnlng inwardly conduct the air in the space between the outer and radiating CYllIlClBIS below the flange into the space between theheater and radiating cylinders above the flange, and those inclining outwardly conduct the air in the space between the heater and radiating cylinders below the flange into the space between the outer and radiating cylinders above the flange, the air enters the space between the heater and radiating cylinders through the openings f,

I in the base see Fig. 5, and the space between the outer and radiating cylinder is supplied with air through openings near the bottom of the cylinder or the outer cylinder may be raised a short distance from the ground or floor. By referring to Fig. 2, it will be seen that the black arrows represent the direction of the air in passing up through both spaces formed by the radiating cylinder and also through the tubes 71 h, on the flange H, H. Now it will be seen that all the air that passes up through the air chamber is brought in contact with the heater or inner cylinder, that which passes up through the apertures f, is in contact with the heater below the flange and is conducted in the space between the radiating and outer cylinders by the tubes 71 on the flange, the air that enters underneath or through apertures near the bottom of the outer cylinder is conducted into the space between the heater and radiating cylinder by the tubes 72,, thus the air as it enters the conducting flues is heated to about the same temperature, any requisite number of tubes may be on the flange.

I, I, Flg. 6, is an annular evaporating pan constructed of cast iron and placed on the steam or any unnecessary or unpleasant amount of moisture in the warm air dis- 7 charging flues.

J, J, are lmmediately over the evaporating pan, and the warm air in entering the fines and consequently passing over the water takes up as much of the vapor as it has an affinity for. Thus the heated air is never surcharged with moisture.

K, is a tube connecting the heater or inner cylinder E, E, with the smoke pipe L. m, is a self regulating damper placed within the tube, its arrangement will be distinctly understood by referring to Fig. 4.

g, is a strip of brass attached to the tube and having one end i, bent outward, the damper is hung upon an iron wire j, passing through at about the center of the strip 9, this wire'on the outside of the tube K, is bent. around so as to catch under the lip i, on the brass strip 9, and when in this position the damper is open and there is consequently a direct draft from the fire pot A, to smoke pipe L, as seen by the blue arrows Fig. 2, the damper is to be open when kindling the fire and as the heat increases the brass strip g, expands until the iron wire 9', is released from the lip 71, and falls by its own gravity into the position shown by the dotted lines and the damper is closed, when in this position the draft is in the direction of the red arrows see Fig. 2, thus the heat and gases of combustion are drawn down all around the fire pot and pass through the apertures d, Figs. 1 and 2, into the circular passage 0, and thence into the by this arrangement the smoke pipe L, heater or inner cylinder E, E, is kept at nearly a uniform temperature. There are additional dampers for regulating the supply of air for combustion and to furnish a draft for the smoke flue L, to carry off the smoke and gases when the other damper is closed,by referring to Fig. 3, this arrangement will readily be understood. L

M, is the aperture (open) which supplies air for combustion and I N, (closed) is the aperture which supplies a'draft to the smoke flue or pipe L, these apertures are covered by lips O, P, attached to a rod R, having its fulcrum at 1".

S, is a brass expansion rod its upper end attached to the outside of the smoke pipe and its lower end attached to a small lever .9, now as the rod S, expands the lip O, is forced down and the aperture N, is uncovered while at the same time the lip P,

rises and the aperture M, is closed by it.

The supply of air for combustion may be introduced from the rear and regulated by the same expansion rod but dispensing with g the longer lever.

Having thus described the nature of my invention and the manner in which it is constructed what I claim as new and deslre to secure by Letters Patent is- The use of an equalizing flange H, H, with the tubes h, h, attached by which the air on each side of the radiating cylinder is warmed to about the same temperature before entering the warm air conducting fiues.

ALEXANDER KELSEY.

Witnesses:

C. C. GARBUTT, 7 JOHN WRIGHT. 

